13 files declare their use of SearchApiQuery in Search API 8

AllTermsArgumentTest.php in tests/src/Unit/Views/AllTermsArgumentTest.php

SearchApiCachePluginTrait.php in src/Plugin/views/cache/SearchApiCachePluginTrait.php

SearchApiDataRow.php in src/Plugin/views/row/SearchApiDataRow.php

SearchApiFulltext.php in src/Plugin/views/argument/SearchApiFulltext.php

SearchApiHandlerTrait.php in src/Plugin/views/SearchApiHandlerTrait.php

SearchApiRenderedItem.php in src/Plugin/views/field/SearchApiRenderedItem.php

SearchApiRow.php in src/Plugin/views/row/SearchApiRow.php

search_api.module in ./search_api.module

Provides a rich framework for creating searches.

ViewsBulkOperationsEventSubscriber.php in src/Contrib/ViewsBulkOperationsEventSubscriber.php

ViewsDisplayDeriver.php in src/Plugin/search_api/display/ViewsDisplayDeriver.php

ViewsFieldTraitTest.php in tests/src/Kernel/Views/ViewsFieldTraitTest.php

ViewsPropertyExtractionTest.php in tests/src/Kernel/Views/ViewsPropertyExtractionTest.php

ViewsTestField.php in tests/src/Kernel/ViewsTestField.php